/*
 * Copyright (C) 2007 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.android.dx.cf.attrib;

import com.android.dx.util.MutabilityException;

/**
 * Attribute class for standard {@code InnerClasses} attributes.
 */
public final class AttInnerClasses extends BaseAttribute {

	/** {@code non-null;} attribute name for attributes of this type */
	public static final String ATTRIBUTE_NAME = "InnerClasses";

	/** {@code non-null;} list of inner class entries */
	private final InnerClassList innerClasses;

	/**
	 * Constructs an instance.
	 * 
	 * @param innerClasses
	 *            {@code non-null;} list of inner class entries
	 */
	public AttInnerClasses(InnerClassList innerClasses) {
		super(ATTRIBUTE_NAME);

		try {
			if (innerClasses.isMutable()) {
				throw new MutabilityException("innerClasses.isMutable()");
			}
		} catch (NullPointerException ex) {
			// Translate the exception.
			throw new NullPointerException("innerClasses == null");
		}

		this.innerClasses = innerClasses;
	}

	/** {@inheritDoc} */
	public int byteLength() {
		return 8 + innerClasses.size() * 8;
	}

	/**
	 * Gets the list of "inner class" entries associated with this instance.
	 * 
	 * @return {@code non-null;} the list
	 */
	public InnerClassList getInnerClasses() {
		return innerClasses;
	}
}
